BUCHANAN, G. D. B.A., M.A., Ph.D. — Div. of Anat.. Med. Units, Fac. 

 of Biol. Sci., Univ. of Tennessee, MEMPHIS 3, Tenn., U.S.A. 

 a. Mechanism of delayed implantation; experimental implantation during 

 delay. Dasypus novemcinctus (Xenarthra) 

 BttCKMANN, D. Dr.rer.nat. — Zool. Inst, der Univ., Berlinerstr. 28, G5T- 

 TINGEN, Deutschland 

 a. Entwicklungsphysiologie der Metamorphose. (Insecta) 

 BULMER, D. M.A., M.D. — Dept. of Anat., Marischal Coll., ABERDEEN, 

 Scotland 

 a. Placental hormones, cytochemistry of placenta, implantation, metabolism 

 of cleaving ova. (Rodentia) (in collaboration with A. D. DICKSON) 

 BUftO, W. B.Sc, Ph.D., Prof. — Dept. de Histol. y Embriol., Fac. de Med., 



MONTEVIDEO, Uruguay, S. America 

 BURDON-JONES, C. B.Sc, Ph.D. — Marine Biol. Station, Univ. Coll. of 

 North Wales, MENAI BRIDGE, Anglesey, Wales 

 a. Embryology. (Hemichordata, Gastropoda) 

 BURNS, R. K. A.B., Ph.D., F.I. I. E. — Dept. of Embryol., Carnegie Inst, 

 of Washington, Wolfe and Madison Sts., BALTIMORE 5, Md., U.S.A. 

 a. Mechanisms of sex differentiation as studied experimentally. Didelphis 

 virginiana (Matsupialia) 

 BUTLER, E. G. Ph.D., D.Sc, F.I. I.E., Prof. — Dept. of Biol., Princeton 

 Univ., Box 704, PRINCETON, N.J., U.S.A. 



a. Study of the mechanics of the formation of the regeneration blastema. 

 The influence of nerves on blastema formation. Regression in nerveless 

 non-regenerating limbs. Ambystoma punctatum, A. opacum (Utodela) 



b. Regression (reduction) and subsequent reconstitution. Clavelina lepadi- 

 [ormis (Tunicata, Urochordata) 



c. Effects of ultraviolet radiation on limb development and limb regenera- 

 tion. (Urodela) 



d. Problems of polarity in the limb. Regeneration after reversal of the 

 proximo-distal axis. (Urodela) 



BUTLER, H. M.A., M.D., B.Chir. — Dept. of Anat., Kitchener School of 

 Med., Univ. of Khartoum, KHARTOUM, Sudan 



a. The reproductive cycle and early development. Galago senegalensis 

 senegalensis (Primates) 



b. The development of the intestine. Hyrax spec. (Hyracoidea) 

 BUTROS, J. M. M.A., Ph.D. — Biol. Dept., American Univ., BEIRUT, 



Lebanon 



a. Cytoplasmic viscosity in the egg during suppressed respiration. (Echi- 

 noidea) 



b. Stimulation of cleavage with desoxyribonucleic acid fractions. Arbacia 

 spec. ( Echinoidea) 



BUYUKoZER, Miss I. M.D. — Morfologi Enstitiisu, Tip Fakiiltesi, Ege 

 Universitesi, Bornova, IZMIR, Turkey 

 (no embryological work in progress) 

 BYCZKOWSKA (SMYK), Mrs. W. Mgr. — Zaklad Anat. Porownawczej 

 U.J. im H. Hoyera, sw. Anny 6, KRAKOW, Poland 

 a. Development of respiratory surfaces of gills. (Salmonidae, Teleostei) 

 CAIRNS J. M. A.B., M.S., Ph.D. — Biol. Station, Roswell Park Memorial 

 Inst., SPRINGVILLE, N.Y., U.S.A. 



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